Behave by Robert Sapolsky is a groundbreaking exploration of why humans act the way they do. From split-second brain activity to childhood experiences, hormones, culture, and even our evolutionary past, Sapolsky traces the layers of influence behind every behavior. With clarity, humor, and insight, he examines questions of morality, free will, tribalism, and compassion. The result is a masterful and deeply human look at what drives us—for better or worse.